java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/llreve-bench/smt2/loop__while-if.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:00:03,541 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:00:03,543 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:00:03,553 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:00:03,553 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:00:03,554 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:00:03,558 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:00:03,560 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:00:03,561 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:00:03,563 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:00:03,564 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:00:03,564 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:00:03,565 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:00:03,566 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:00:03,570 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:00:03,571 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:00:03,572 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:00:03,574 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:00:03,575 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:00:03,576 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:00:03,577 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:00:03,580 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:00:03,580 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:00:03,580 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:00:03,581 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:00:03,582 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:00:03,582 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:00:03,583 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:00:03,584 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:00:03,584 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:00:03,585 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:00:03,586 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:00:03,586 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:00:03,587 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:00:03,587 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:00:03,587 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 12:00:03,607 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:00:03,612 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:00:03,612 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:00:03,613 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:00:03,614 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:00:03,614 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:00:03,614 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:00:03,614 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:00:03,614 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:00:03,615 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:00:03,615 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:00:03,615 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:00:03,615 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:00:03,615 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:00:03,615 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:00:03,616 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:00:03,616 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:00:03,616 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:00:03,616 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:00:03,617 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:00:03,618 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:00:03,658 INFO ]: Repository-Root is: /tmp [2018-06-22 12:00:03,674 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:00:03,680 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:00:03,681 INFO ]: Initializing SmtParser... [2018-06-22 12:00:03,682 INFO ]: SmtParser initialized [2018-06-22 12:00:03,682 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__while-if.smt2 [2018-06-22 12:00:03,684 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 12:00:03,774 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__while-if.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@33b07166 [2018-06-22 12:00:03,974 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__while-if.smt2 [2018-06-22 12:00:03,983 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:00:03,992 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:00:03,992 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:00:03,992 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:00:03,992 INFO ]: ChcToBoogie initialized [2018-06-22 12:00:03,995 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:00:03" (1/1) ... [2018-06-22 12:00:04,040 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04 Unit [2018-06-22 12:00:04,041 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:00:04,042 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:00:04,042 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:00:04,042 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:00:04,066 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... [2018-06-22 12:00:04,066 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... [2018-06-22 12:00:04,073 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... [2018-06-22 12:00:04,074 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... [2018-06-22 12:00:04,076 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... [2018-06-22 12:00:04,078 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... [2018-06-22 12:00:04,079 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... [2018-06-22 12:00:04,080 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:00:04,081 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:00:04,081 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:00:04,081 INFO ]: RCFGBuilder initialized [2018-06-22 12:00:04,084 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 12:00:04,099 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:00:04,100 INFO ]: Found specification of procedure False [2018-06-22 12:00:04,100 INFO ]: Found implementation of procedure False [2018-06-22 12:00:04,100 INFO ]: Specification and implementation of procedure INV_MAIN_42 given in one single declaration [2018-06-22 12:00:04,100 INFO ]: Found specification of procedure INV_MAIN_42 [2018-06-22 12:00:04,100 INFO ]: Found implementation of procedure INV_MAIN_42 [2018-06-22 12:00:04,100 INFO ]: Specification and implementation of procedure INV_MAIN_23 given in one single declaration [2018-06-22 12:00:04,100 INFO ]: Found specification of procedure INV_MAIN_23 [2018-06-22 12:00:04,100 INFO ]: Found implementation of procedure INV_MAIN_23 [2018-06-22 12:00:04,100 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:00:04,100 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:00:04,100 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:00:04,398 INFO ]: Using library mode [2018-06-22 12:00:04,399 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:00:04 BoogieIcfgContainer [2018-06-22 12:00:04,399 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:00:04,400 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:00:04,400 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:00:04,404 INFO ]: TraceAbstraction initialized [2018-06-22 12:00:04,404 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:00:03" (1/3) ... [2018-06-22 12:00:04,405 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418ca6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:00:04, skipping insertion in model container [2018-06-22 12:00:04,405 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:00:04" (2/3) ... [2018-06-22 12:00:04,406 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418ca6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:00:04, skipping insertion in model container [2018-06-22 12:00:04,406 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:00:04" (3/3) ... [2018-06-22 12:00:04,408 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:00:04,417 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:00:04,430 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:00:04,479 INFO ]: Using default assertion order modulation [2018-06-22 12:00:04,480 INFO ]: Interprodecural is true [2018-06-22 12:00:04,480 INFO ]: Hoare is false [2018-06-22 12:00:04,480 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:00:04,480 INFO ]: Backedges is TWOTRACK [2018-06-22 12:00:04,480 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:00:04,480 INFO ]: Difference is false [2018-06-22 12:00:04,480 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:00:04,480 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:00:04,508 INFO ]: Start isEmpty. Operand 20 states. [2018-06-22 12:00:04,530 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:00:04,531 INFO ]: Found error trace [2018-06-22 12:00:04,531 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:04,533 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:04,539 INFO ]: Analyzing trace with hash -290736533, now seen corresponding path program 1 times [2018-06-22 12:00:04,541 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:04,541 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:04,591 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:04,591 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:04,591 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:04,630 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:04,737 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:00:04,740 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:00:04,740 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:00:04,741 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:00:04,752 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:00:04,752 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:00:04,754 INFO ]: Start difference. First operand 20 states. Second operand 4 states. [2018-06-22 12:00:04,832 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:04,833 INFO ]: Finished difference Result 22 states and 30 transitions. [2018-06-22 12:00:04,833 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:00:04,834 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:00:04,834 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:04,844 INFO ]: With dead ends: 22 [2018-06-22 12:00:04,844 INFO ]: Without dead ends: 22 [2018-06-22 12:00:04,845 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:00:04,857 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-22 12:00:04,878 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-06-22 12:00:04,880 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-22 12:00:04,881 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-06-22 12:00:04,882 INFO ]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 9 [2018-06-22 12:00:04,882 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:04,882 INFO ]: Abstraction has 20 states and 28 transitions. [2018-06-22 12:00:04,882 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:00:04,882 INFO ]: Start isEmpty. Operand 20 states and 28 transitions. [2018-06-22 12:00:04,885 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:00:04,885 INFO ]: Found error trace [2018-06-22 12:00:04,885 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:04,886 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:04,886 INFO ]: Analyzing trace with hash 2125945489, now seen corresponding path program 1 times [2018-06-22 12:00:04,886 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:04,886 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:04,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:04,887 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:04,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:04,896 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:05,051 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:00:05,051 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:00:05,051 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:00:05,052 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:00:05,053 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:00:05,053 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:00:05,053 INFO ]: Start difference. First operand 20 states and 28 transitions. Second operand 4 states. [2018-06-22 12:00:05,222 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:05,222 INFO ]: Finished difference Result 24 states and 34 transitions. [2018-06-22 12:00:05,223 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:00:05,223 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:00:05,223 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:05,224 INFO ]: With dead ends: 24 [2018-06-22 12:00:05,224 INFO ]: Without dead ends: 24 [2018-06-22 12:00:05,225 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:00:05,225 INFO ]: Start minimizeSevpa. Operand 24 states. [2018-06-22 12:00:05,231 INFO ]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-06-22 12:00:05,231 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-22 12:00:05,232 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2018-06-22 12:00:05,232 INFO ]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 9 [2018-06-22 12:00:05,233 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:05,233 INFO ]: Abstraction has 22 states and 32 transitions. [2018-06-22 12:00:05,233 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:00:05,233 INFO ]: Start isEmpty. Operand 22 states and 32 transitions. [2018-06-22 12:00:05,234 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:00:05,234 INFO ]: Found error trace [2018-06-22 12:00:05,234 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:05,234 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:05,234 INFO ]: Analyzing trace with hash 21249199, now seen corresponding path program 1 times [2018-06-22 12:00:05,234 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:05,234 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:05,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:05,235 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:05,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:05,249 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:05,598 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:00:05,598 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:00:05,598 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:00:05,606 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:05,635 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:05,643 INFO ]: Computing forward predicates... [2018-06-22 12:00:05,847 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:00:05,869 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:00:05,869 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 12:00:05,870 INFO ]: Interpolant automaton has 7 states [2018-06-22 12:00:05,870 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 12:00:05,870 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 12:00:05,870 INFO ]: Start difference. First operand 22 states and 32 transitions. Second operand 7 states. [2018-06-22 12:00:06,021 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:06,021 INFO ]: Finished difference Result 22 states and 31 transitions. [2018-06-22 12:00:06,022 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:00:06,022 INFO ]: Start accepts. Automaton has 7 states. Word has length 13 [2018-06-22 12:00:06,022 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:06,022 INFO ]: With dead ends: 22 [2018-06-22 12:00:06,022 INFO ]: Without dead ends: 15 [2018-06-22 12:00:06,023 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:00:06,023 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 12:00:06,025 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 12:00:06,026 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 12:00:06,026 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-22 12:00:06,026 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 13 [2018-06-22 12:00:06,026 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:06,026 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-22 12:00:06,026 INFO ]: Interpolant automaton has 7 states. [2018-06-22 12:00:06,027 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-22 12:00:06,027 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:00:06,027 INFO ]: Found error trace [2018-06-22 12:00:06,027 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:06,028 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:06,028 INFO ]: Analyzing trace with hash 197319859, now seen corresponding path program 1 times [2018-06-22 12:00:06,028 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:06,028 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:06,029 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:06,029 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:06,029 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:06,036 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:06,085 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:00:06,086 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:00:06,086 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:00:06,086 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:00:06,086 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:00:06,086 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:00:06,086 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2018-06-22 12:00:06,431 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:06,431 INFO ]: Finished difference Result 24 states and 42 transitions. [2018-06-22 12:00:06,432 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 12:00:06,432 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 12:00:06,432 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:06,433 INFO ]: With dead ends: 24 [2018-06-22 12:00:06,433 INFO ]: Without dead ends: 24 [2018-06-22 12:00:06,433 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 12:00:06,433 INFO ]: Start minimizeSevpa. Operand 24 states. [2018-06-22 12:00:06,439 INFO ]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-06-22 12:00:06,439 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-22 12:00:06,440 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 36 transitions. [2018-06-22 12:00:06,440 INFO ]: Start accepts. Automaton has 22 states and 36 transitions. Word has length 13 [2018-06-22 12:00:06,440 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:06,440 INFO ]: Abstraction has 22 states and 36 transitions. [2018-06-22 12:00:06,440 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:00:06,440 INFO ]: Start isEmpty. Operand 22 states and 36 transitions. [2018-06-22 12:00:06,441 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:00:06,441 INFO ]: Found error trace [2018-06-22 12:00:06,442 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:06,442 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:06,442 INFO ]: Analyzing trace with hash 1080848575, now seen corresponding path program 1 times [2018-06-22 12:00:06,442 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:06,442 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:06,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:06,443 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:06,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:06,449 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:06,472 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:00:06,472 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:00:06,472 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:00:06,472 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:00:06,472 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:00:06,472 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:00:06,473 INFO ]: Start difference. First operand 22 states and 36 transitions. Second operand 4 states. [2018-06-22 12:00:06,772 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:06,772 INFO ]: Finished difference Result 31 states and 55 transitions. [2018-06-22 12:00:06,775 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 12:00:06,775 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 12:00:06,775 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:06,776 INFO ]: With dead ends: 31 [2018-06-22 12:00:06,776 INFO ]: Without dead ends: 27 [2018-06-22 12:00:06,776 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 12:00:06,776 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 12:00:06,788 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 12:00:06,788 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 12:00:06,789 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 46 transitions. [2018-06-22 12:00:06,789 INFO ]: Start accepts. Automaton has 27 states and 46 transitions. Word has length 13 [2018-06-22 12:00:06,789 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:06,789 INFO ]: Abstraction has 27 states and 46 transitions. [2018-06-22 12:00:06,789 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:00:06,789 INFO ]: Start isEmpty. Operand 27 states and 46 transitions. [2018-06-22 12:00:06,793 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:00:06,793 INFO ]: Found error trace [2018-06-22 12:00:06,793 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:06,794 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:06,794 INFO ]: Analyzing trace with hash 835597722, now seen corresponding path program 1 times [2018-06-22 12:00:06,794 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:06,794 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:06,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:06,795 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:06,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:06,808 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:07,083 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:00:07,083 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:00:07,083 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:00:07,090 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:07,098 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:07,101 INFO ]: Computing forward predicates... [2018-06-22 12:00:07,230 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:00:07,249 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:00:07,249 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 12:00:07,250 INFO ]: Interpolant automaton has 8 states [2018-06-22 12:00:07,250 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 12:00:07,250 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 12:00:07,250 INFO ]: Start difference. First operand 27 states and 46 transitions. Second operand 8 states. [2018-06-22 12:00:07,316 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:07,316 INFO ]: Finished difference Result 33 states and 54 transitions. [2018-06-22 12:00:07,316 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:00:07,316 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 12:00:07,316 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:07,318 INFO ]: With dead ends: 33 [2018-06-22 12:00:07,318 INFO ]: Without dead ends: 33 [2018-06-22 12:00:07,318 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:00:07,318 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-22 12:00:07,325 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-06-22 12:00:07,325 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 12:00:07,326 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 50 transitions. [2018-06-22 12:00:07,326 INFO ]: Start accepts. Automaton has 29 states and 50 transitions. Word has length 13 [2018-06-22 12:00:07,326 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:07,326 INFO ]: Abstraction has 29 states and 50 transitions. [2018-06-22 12:00:07,326 INFO ]: Interpolant automaton has 8 states. [2018-06-22 12:00:07,326 INFO ]: Start isEmpty. Operand 29 states and 50 transitions. [2018-06-22 12:00:07,327 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:00:07,327 INFO ]: Found error trace [2018-06-22 12:00:07,327 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:07,328 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:07,328 INFO ]: Analyzing trace with hash -882130973, now seen corresponding path program 2 times [2018-06-22 12:00:07,328 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:07,328 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:07,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:07,328 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:07,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:07,340 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:07,523 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:00:07,523 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:00:07,523 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:00:07,536 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:00:07,566 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:00:07,566 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:07,568 INFO ]: Computing forward predicates... [2018-06-22 12:00:07,687 INFO ]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:00:07,709 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:00:07,709 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2018-06-22 12:00:07,710 INFO ]: Interpolant automaton has 11 states [2018-06-22 12:00:07,710 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 12:00:07,710 INFO ]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-06-22 12:00:07,710 INFO ]: Start difference. First operand 29 states and 50 transitions. Second operand 11 states. [2018-06-22 12:00:07,955 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:07,955 INFO ]: Finished difference Result 49 states and 82 transitions. [2018-06-22 12:00:07,956 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 12:00:07,956 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 12:00:07,956 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:07,957 INFO ]: With dead ends: 49 [2018-06-22 12:00:07,957 INFO ]: Without dead ends: 49 [2018-06-22 12:00:07,957 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-06-22 12:00:07,958 INFO ]: Start minimizeSevpa. Operand 49 states. [2018-06-22 12:00:07,968 INFO ]: Finished minimizeSevpa. Reduced states from 49 to 27. [2018-06-22 12:00:07,968 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 12:00:07,969 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 46 transitions. [2018-06-22 12:00:07,969 INFO ]: Start accepts. Automaton has 27 states and 46 transitions. Word has length 17 [2018-06-22 12:00:07,969 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:07,969 INFO ]: Abstraction has 27 states and 46 transitions. [2018-06-22 12:00:07,969 INFO ]: Interpolant automaton has 11 states. [2018-06-22 12:00:07,969 INFO ]: Start isEmpty. Operand 27 states and 46 transitions. [2018-06-22 12:00:07,970 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:00:07,970 INFO ]: Found error trace [2018-06-22 12:00:07,970 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:07,970 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:07,971 INFO ]: Analyzing trace with hash -655621764, now seen corresponding path program 1 times [2018-06-22 12:00:07,971 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:07,971 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:07,971 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:07,971 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:00:07,971 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:07,988 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:08,028 INFO ]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 12:00:08,028 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:00:08,028 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 12:00:08,028 INFO ]: Interpolant automaton has 5 states [2018-06-22 12:00:08,028 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 12:00:08,028 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 12:00:08,029 INFO ]: Start difference. First operand 27 states and 46 transitions. Second operand 5 states. [2018-06-22 12:00:08,130 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:08,130 INFO ]: Finished difference Result 27 states and 43 transitions. [2018-06-22 12:00:08,130 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:00:08,130 INFO ]: Start accepts. Automaton has 5 states. Word has length 17 [2018-06-22 12:00:08,130 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:08,131 INFO ]: With dead ends: 27 [2018-06-22 12:00:08,131 INFO ]: Without dead ends: 22 [2018-06-22 12:00:08,131 INFO ]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-22 12:00:08,132 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-22 12:00:08,136 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-06-22 12:00:08,136 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-22 12:00:08,137 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2018-06-22 12:00:08,137 INFO ]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 17 [2018-06-22 12:00:08,137 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:08,137 INFO ]: Abstraction has 20 states and 29 transitions. [2018-06-22 12:00:08,137 INFO ]: Interpolant automaton has 5 states. [2018-06-22 12:00:08,137 INFO ]: Start isEmpty. Operand 20 states and 29 transitions. [2018-06-22 12:00:08,138 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:00:08,138 INFO ]: Found error trace [2018-06-22 12:00:08,138 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:00:08,139 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:00:08,139 INFO ]: Analyzing trace with hash -2119757432, now seen corresponding path program 1 times [2018-06-22 12:00:08,139 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:00:08,139 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:00:08,142 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:08,142 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:00:08,142 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:00:08,153 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:00:08,203 INFO ]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 12:00:08,203 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:00:08,203 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 12:00:08,203 INFO ]: Interpolant automaton has 5 states [2018-06-22 12:00:08,203 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 12:00:08,203 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 12:00:08,204 INFO ]: Start difference. First operand 20 states and 29 transitions. Second operand 5 states. [2018-06-22 12:00:08,228 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:00:08,228 INFO ]: Finished difference Result 14 states and 19 transitions. [2018-06-22 12:00:08,228 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:00:08,228 INFO ]: Start accepts. Automaton has 5 states. Word has length 17 [2018-06-22 12:00:08,228 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:00:08,228 INFO ]: With dead ends: 14 [2018-06-22 12:00:08,228 INFO ]: Without dead ends: 0 [2018-06-22 12:00:08,228 INFO ]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 12:00:08,229 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 12:00:08,229 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 12:00:08,229 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 12:00:08,229 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 12:00:08,229 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-06-22 12:00:08,229 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:00:08,229 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 12:00:08,229 INFO ]: Interpolant automaton has 5 states. [2018-06-22 12:00:08,229 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 12:00:08,229 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 12:00:08,233 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:00:08 BoogieIcfgContainer [2018-06-22 12:00:08,233 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:00:08,234 INFO ]: Toolchain (without parser) took 4250.09 ms. Allocated memory was 309.3 MB in the beginning and 337.1 MB in the end (delta: 27.8 MB). Free memory was 265.7 MB in the beginning and 302.7 MB in the end (delta: -37.0 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:00:08,235 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:00:08,235 INFO ]: ChcToBoogie took 49.40 ms. Allocated memory is still 309.3 MB. Free memory was 264.7 MB in the beginning and 263.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 12:00:08,236 INFO ]: Boogie Preprocessor took 38.51 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:00:08,236 INFO ]: RCFGBuilder took 318.07 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 253.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:00:08,237 INFO ]: TraceAbstraction took 3832.58 ms. Allocated memory was 309.3 MB in the beginning and 337.1 MB in the end (delta: 27.8 MB). Free memory was 253.7 MB in the beginning and 302.7 MB in the end (delta: -49.1 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:00:08,245 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.40 ms. Allocated memory is still 309.3 MB. Free memory was 264.7 MB in the beginning and 263.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * Boogie Preprocessor took 38.51 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 318.07 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 253.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3832.58 ms. Allocated memory was 309.3 MB in the beginning and 337.1 MB in the end (delta: 27.8 MB). Free memory was 253.7 MB in the beginning and 302.7 MB in the end (delta: -49.1 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 3.7s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 31 SDslu, 297 SDs, 0 SdLazy, 305 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 34 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 8544 SizeOfPredicates, 18 NumberOfNonLiveVariables, 182 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 35/56 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__while-if.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-00-08-259.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__while-if.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-00-08-259.csv Received shutdown request...